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ADDNG MAGHINE.

a Patented Aug` 17,1897.

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(No Moden.) 2 sheets-sheet 2. W. J. ENSWORTH.

ADDING MACHINE. No. 588,409. Patented Aug. 17,1897.

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UNITED STATES PATENT OFFICE.

1VILLIAM J. ENSVORTI'I, OF ERIE, PENNSYLVANIA, ASSIGNOR OF ONE- FOURTHTO JOHN W. GALBRAITII, OF SAME PLACE.

ADDING-MACHINE.

SPECIFICATION forming part of Letters Patent N o. 588,409, dated August17, 1897.

Application filed March 23, 1897. Serial No. 628,847. No model.)

To all whom t may concer/1,:

Be it known that I, WILLIAM J. ENsWoRTII, of Erie, in the county ofErie'and State of Pennsylvania, have invented a new and ImprovedAdding-Machine, of which the following is a full, clear, and exactdescription.

This invention is an apparatus for successively casting individualnumbers into the register of an aggregate sum and for indicating theoperations of the machine both to the operator and others in attendance.

The invention is particularly adapted -tor use as a cash-register inmercantile establishments.

This specification is the disclosure oi several forms of my invention,while the claims deline the actual scope of the conception.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the iigures.

Figure 1 is a front elevation 0i' one form of my invention. Fig. 2 is asectional view on the line 2 2 of Fig. 1. Fig. 3 is a front elevation ofa modified form of the invention. Fig. 4 is a sectional view of one ofthe dialoperating devices, and Fig. 5 is an elevation of a modified formof these devices.

The form of the invention shown in Figs. 1 and 2 has a horizontal base6, wherein operates a cash-drawer 7. From the rear of the base G a rigidback plate S rises. The back plate S is connected to forwardly-runningtop and side plates 9 and 9, The front edges of the plates 9 9a carry ametal plate 10. Contained within the casing formed by the parts S, 9, 9,and 10 are two registering-disks 11 and 13, mounted to turn on parallelaxes and respectively registering with circular openings 12, formed inthe metal plate 10. The Ineans for revolubly mounting the disks 11 and13 will be described hereinafter. These means :i'or mounting the disks11 and 13 also hold circular metal plates 14, concentric with the disks11 and 13. The peripheries of the disks 11 and 13 have each a hundrednotches. Each notch is indicated by a numeral marked on the respectivedisks. The edges of the plate 10, surrounding the openings 12 therein,arc also each marked with numbers running from 1 to 100 and arrangedoppositely with disks at the axes of the disks.

reference to the arrangement and numerals on the disks 11 and 13.

Each disk 11 and 13 has an operating-arm 15. The arms 15respectivelyswing on axes coincident to the axes ofthe disks 11 and 13;but the arms 15 have no iixed connection with the Each arm 15 has a pin1G projecting inwardly respectively through the spaces between theplates 14 and the plate 10. The pins 16 respectively engage with thenotches in the peripheries oli' the disks 11 and 13 when the arms 15 arein the position shown in Fig. 2 of the drawingsthat is to say, when thearms 15 lie closely against the plates 11 and 10.

The means 'for mounting the arms 15 are such as permit the arms to slideaxially, so that the pins 1G Inay be disengaged from the disks 11 and13. Mounted within the casing formed by the parts 3, 9, 9, and 10 is alever 17. One end of the lever 17 carries a springpawI1S, engaging thetoothed periphery of the disk 13, while the other end of the lever 17 isadapted to be struck by a pin 19, carried 011 the rear face of the disk11. Each disk 11 and 13 coacts with a spring stop-pawl 20, carried bythe casing formed of the parts S, 9, 9, and 10.

IVhen the machine is used in connection wi th the decimal system ofmonetary enumeration, the disk 11 represents cents and the disk 13dollars. Should the operator desire to register one dollar and sixtycents, the arm 15 of the disk 11 is turned until the number GO on theperiphery of the disk 11 is opposite to zero-point of the numbers on theplate 10 at points adjacent to the disk 11. The arm 15 of the disk 13 isthen turned to place the number 1'I7 on such disk opposite thecorresponding zero-mark. The register will now show one point on thedollar-disk and sixty points on the cent-disk. Should it be desired toregister at two operations sixty and eighty cents, respectively, the arm15 of the disk 11 is moved first to the numeral 60 of the plate 10. Thearm 15 is next returned to the starting-point by devices which will behereinafter described and then moved to move the disk 11 eighty pointswith reference to the plate 10. These two operations will have moved thedisk 11 one hundred and IOO forty points in total, which will cause thelever 1.7 to be operated to turn the disk 13 one point and leave thedisk 11 registering forty points against the plate 10. The form of theinvention shown in Fig. 1 therefore is capable of registeringninety-nine dollars and ninety-nine cents.

The form of the invention shown in Fig. 3 differs from that in Figs. 1and 2 in that it provides registering-disks 2l, 22, 23, and 24, each.having an operating-arm 25, similar to the arms 15 previouslydescribedFach disk of the form of the invention shown in Fig. 3 is locatedopposite a circular opening 26 in the metal plate 10 of the casing,which is similar` to that shown in Figs. 1 and 2. The means for mountingthe disks 21, 22, 23, and 24 also rigidlycarryconcentric circular metalplates 27 of the same construction as the plates 14 described withreference to Figs. 1 and 2. The disks 2]., 22, 23, and 24 and the plate10 in Fig. 4 have numbers the same as disks 11 and 13 and plate 10, asAshown in Fig. 1. Movement is transmitted from'the disk 21 to the disk 22by a lever 23 the same as by the lever 17 to the disks 11 and 13 inFig. 1. Movement is transmitted from the disk 22 to the disk 23 by alever 29 and from the disk 23 to the disk 24 by a lever 30. Centsregistered on the disk 21 will totalize into dollars on the disk 22, thedollars on the disk 22 will totalize into hundreds of dollars on thedisk 23, and the hundreds of dollars on thedisk 23 will totalize intothousands of dollars on the disk 24. The operation is the same inconnection with numerals merely of the decimal system, the disk 21 beingthe units-disk, the disk 22 the hundreds-disk, the disk 23 thehundred-thousands disk, and the disk 24 the millions-disk. Each disk inFig. 3 is held by a spring-pressed pawl 3l, as in# dicated by dottedlines.

It is necessary to slide the arms for operating theregistering-disks sothat they will disengage the registering-disks and permit the return ofthe arms. Fig. 4 shows the means for mounting the arms 15 so as toperform this operation. The back plate 3 carries a collar 32 for eachdisk-operating arm, and in which tribes 33 are rigidly secured. Thetubes 33 project forwardly and by means of collars 34 respectively carrythe circular metal plates 14 and 27, which respectively cover theregistering-disks. In Fig. 4 the operating-arm is 'considered as one ofthe arms 15, and the metal disk is numbered 14. Loose within each tube33 is a spindle 35, and each spindle 35 projects forwardly beyond thetube 33 and has acollar 3G integral therewith and a collar 37 screwedthereon. Between the collars 3G and 37 of each spindle 35 theoperating-arms are loosely mounted. Each operating-arm is connected by ahelical spring 33 with the respective spindles By these means theoperating-arms are normally kept at their starting or zero points, butmay be moved axially on the spindles 35 against the tensions of theirrespective springs 33.

Each tube 33 has a longitudinally-elongated slot 39 formed therein at apoint between the plates 3 and 14 or 27, and projecting through eachslot 39 is a bar 40. The bars 40 respectively have loose connection withthe spindles 35. As shown in Figs. 1, 2, and 3, each bar 40 is held tothe casing by a staple 41, and the bars 40 are respectively actuated bylevers 42, fulcrumed within the casing and each operative by a key 43,projecting through the plate 10. lVhen the disk-operating arm has beenmoved to turn a disk and it is desired to return the arm to thezero-point without affecting the disk in its new position, the lever 42which is related tothe disk-operating arm in question is operated tomove the appropriate spindle 35, which slides the diskoperating armtherewith and disengages the pin 1G thereof from the registering-disk.Immediately upon this operation the spring 33 will assert itseltI toreturn the operating-arm to the normal position, in which position theoperating arms are respectively pressed against stop-pins 44, carried bythe plate 10. As shown in Fig. 2, the levers 42 and coactin g parts arereturned to normal positions by a spring 45. If desired, all of thelevers 42 may be connected to operate in unison.

As shown in Figs. 1 and 2, the drawer 7 is held closed by a bolt 46,running vertically through the top of the base G and engaging the rearwall of the drawer. The stem 47 of the bolt runs in a bracket 43 andcarries an expansive spiral spring 40. The top of the stem 47 has aT-arm 50, the ends of which are respectively engaged by cams 51 on thestems of the keys 43. Upon the pushing inward of the keys 43 the stem 47will be raised and the drawer 7 released. By these means the lock forthe drawer is operated automat` ically in unison with the other parts.The inclined lower end of the bolt 4G causes the bolt to beautomatically raised upon pushing the drawer to closed position, afterwhich the bolt returns to hold the drawer. This same device may beapplied to the construction shown in Fig. 3.

rlhe constructions described may be used either as machines for addingcolumns of Iigures or they may be used for cash-registers in mercantileconcerns. In the latter capacity it is desirable to indicate to thecustomer standing opposite the person operating the machine the amountregistered. Figs. 2 and 5 show an indicator 52, carried loosely on anextension of the spindle 35 and held at the back of the plate 3, onwhich plate a dial may be produced over which the indicater 52 may play.The indicator 52 moves in unison with the disk with which it isconnected and is returned to zero upon the return of said disk. Toaccomplish this end, the spindle 35 of each registering-disk isprojected rearward through the plate 3 and the indicators 52respectively connected with the disks by springs IOO IIO

53, provision being made for the sliding of the spindles, as previouslydescribed.

In Fig. 5 the spring 53 is shown broken away, but in practice it willpass inward over the tube 33 and be attached to the disk.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. The combination of a registering-disk, a spindleaxially coincident thereto and independent thereof, an operatingarmloose on the spindle,a spring connecting the operatingarm with thespindle, the operating-arm being capable of engaging theregistering-disk, and the spindle being slidable to disengage theoperating-arm and the registering-disk, and means for transmitting'movement to the spindle.

2. The combination of a revolnbly-monnted registering member, anoperating-arm, a spindle axially coincident to the registering memberand having the operating-arm loose thereon, a spring connecting theoperatingarm and spindle, the operating-arm being capable of engagementwith the registering member, a bar engaging the spindle, and a leverengaging the bar whereby to slide the spindle and disengage theoperating-arm and registering member.

3. The combination of a re voluble member,

an arm mounted to swing on an axis coincident to the axis of saidrevoluble member, the arm being capable of engaging with the revolublemember to impart rotary movement thereto,and being slidable axiallytoward and from the revoluble member to engage and disengage the same,and means actuating the arm to return the arm to normal position whendisengaged from said revoluble member.

4. The combination of a revoluble member, an arm swinging on an axiscoincident to the axis of said revoluble member and capable of enga-gingthe revoluble member to impart rotary movement thereto, the arm beingslidable axially to engage and disengage the l'ev- 45 oluble member,means actuating the arm to return the same to normal position when thearm is disengaged from the revoluble member, and means for sliding thearm toward and from the revoluble member.

5. The combination of arevoluble disk having a toothed periphery, an armswinging in parallelism with the disk, and on an axis coincident to theaxis of the disk, the arm having a lateral offset capable of engagingwith the teeth of the disk, and the arm being slidable axially to engageand disengage the said projection with the teeth, and means actuatingthe arm whereby to return the arm to a normal position when the arm isdisengaged from the teeth of the disk.

6. The combination with a casing, of a rev oluble member mountedtherein, a spindle in the casing and axially coincident to the saidrevoluble member,the spindle being slidable longitudinally, a swingingarm carried on the spindle and capable of engaging with the revolublemember to impart rotary movement thereto, the arm being slidable withthe spindle to engage and disengage the revoluble member, and a secondarm in connection with the spindle and located at a portion of thecasing opposite to the portion having the irstnamed arm, the second armfollowing the movements of the spindle and indicating the operation ofthe said iirst arm.

7 The combination of a revoluble member, a swinging arm adjacent to thesaid revoluble member, the arm being movable longitudinally of its axiswhereby to engage and disengage the said movable member, and means forreturning the arm to its normal position when the arm is disengaged fromthe said movable member.

VILLIAM J. ENSVORTH.

Vitnesses:

HENRY A. STRONG, JOHN W. GALBRAITH.

